Bring a little water to the boil in a saucepan, and then reduce the heat so the water is only simmering.
Suspend a small to medium size heat resistant bowl over the water.
Don't allow the bowl to touch the simmering water.
Add the cocoa butter.
It's best if you let it melt before you add in other ingredients.
Mix, until all the ingredients are melted and well combined.
Warning: Do not let any water come inside the bowl!
Add as much stevia extract as you like, to taste.
As for all other spices or salt, add them if you wish.
I, myself, love a bit salted chocolate, with red hot chilli powder added to it, for example.
Pour the chocolate into silicone moulds or small bowls or plates, lined with parchment paper.
Add crushed nuts, if you wish.
Put into the fridge for at least 30 minutes to set.
Break into pieces and enjoy!